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Old 03-21-2019, 06:47 AM   #1 (permalink)
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Jeep 5.9L and AW4?

An AX15 will bolt to a 5.9L, will a AW4?


I ended up with a lower mile 5.9L ZJ thatís got some body/rust issues and possible overdrive going out for $200. From what I have read, the tranny behind it is only going to work in that Jeep.

I had a thought of pulling the engine, scrapping the rest, and putting a AW4 behind it in my buggy. From my readings this hasnít been done but I canít figure out why.
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Old 03-21-2019, 08:33 AM   #2 (permalink)
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I don't think a AW4 will bolt up to a 5.9. The auto in the ZJ is a 46RE which is the same engine used in that era Dodge truck behind the 1500/2500 with a gas engine. When doing a engine swap into a TJ or YJ you have to use a Dakota NV3500 bellhousing to be able to use the AX-15. So since of that my guess is a AW4 won't work.
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Old 03-21-2019, 08:36 AM   #3 (permalink)
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You can bolt an AX15 to a 4.0
You can bolt an AW4 to a 4.0

You can bolt a AX15 to a 5.9
Why can’t you bolt an AW4 to a 5.9?

Edit: Apparently The AX15 uses different bell housings so this won’t work.
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Old 03-21-2019, 08:44 AM   #4 (permalink)
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Originally Posted by wildman4x4nut View Post
I don't think a AW4 will bolt up to a 5.9. The auto in the ZJ is a 46RE which is the same engine used in that era Dodge truck behind the 1500/2500 with a gas engine. When doing a engine swap into a TJ or YJ you have to use a Dakota NV3500 bellhousing to be able to use the AX-15. So since of that my guess is a AW4 won't work.
The YJ came with an AX15, there is no bellhousing switch?

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Originally Posted by Beat95YJ View Post
You can bolt an AX15 to a 4.0
You can bolt an AW4 to a 4.0

You can bolt a AX15 to a 5.9
Why canít you bolt an AW4 to a 5.9?

That's my thought. Just didn't know what issues come into play with the flexplate.
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Old 03-21-2019, 09:17 AM   #5 (permalink)
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Originally Posted by ky scrambled View Post
That's my thought. Just didn't know what issues come into play with the flexplate.
Yeah you may have to monkey with it a little.
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Old 03-21-2019, 09:21 AM   #6 (permalink)
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Quote:
Originally Posted by Beat95YJ View Post
You can bolt an AX15 to a 4.0
You can bolt an AW4 to a 4.0

You can bolt a AX15 to a 5.9
Why canít you bolt an AW4 to a 5.9?
My thoughts exactly.

The only issue I could foresee is the flex plate/TC. Iím sure Novak or AA has something if a mixture of OEM parts will not work.

Also does the 5.9 use a bellhousing mounted CPS? That could be another issue.
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Old 03-21-2019, 10:30 AM   #7 (permalink)
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Originally Posted by Byro View Post
My thoughts exactly.

The only issue I could foresee is the flex plate/TC. Iím sure Novak or AA has something if a mixture of OEM parts will not work.

Also does the 5.9 use a bellhousing mounted CPS? That could be another issue.
Flexplates below


4.0
Ring Gear Tooth Quantity: 164-tooth
Engine Balance: Internal
Flexplate Material: Steel
Notes: 13.81 in. outside diameter, 12 pitch.

5.9
Ring Gear Tooth Quantity: 164-tooth
Engine Balance: External
Flexplate Material: Steel
Notes: 11.5 in. outside diameter.


Looks like the 5.9 has a CPS in a very similar location to the 4.0.
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Old 03-21-2019, 10:36 AM   #8 (permalink)
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The biggest thing is going to be the indexing of the pick up between the two.

If you could get away with the AW4 flex TC and starter that would make life pretty easy.
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Old 03-21-2019, 10:57 AM   #9 (permalink)
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The biggest thing is going to be the indexing of the pick up between the two.

If you could get away with the AW4 flex TC and starter that would make life pretty easy.
The distance between the end of the sensor and the gaps in the flexplate you mean?
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Old 03-22-2019, 06:49 AM   #10 (permalink)
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You have to change the bellhousing on the AX-15 to be able to bolt it to a 5.9.

94-99 Dodge 3.9 V6 Bellhousing (Bolts up to the V8 and AX15 or Nv3550)
This is from one of the Dodge V-8 swap threads on JF

https://www.pirate4x4.com/forum/jeep...-question.html

https://www.novak-adapt.com/catalog/...-bellhousings/

You have to get the bellhousing from a Dodge Dakota. The 4.0 bellhousing WON'T bolt up.

https://www.jeepforum.com/forum/f12/...using-1292403/

https://nc4x4.com/forum/threads/5-2-...pattern.11438/
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Old 03-22-2019, 08:33 AM   #11 (permalink)
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Quote:
Originally Posted by wildman4x4nut View Post
You have to change the bellhousing on the AX-15 to be able to bolt it to a 5.9.

94-99 Dodge 3.9 V6 Bellhousing (Bolts up to the V8 and AX15 or Nv3550)
This is from one of the Dodge V-8 swap threads on JF

https://www.pirate4x4.com/forum/jeep...-question.html

https://www.novak-adapt.com/catalog/...-bellhousings/

You have to get the bellhousing from a Dodge Dakota. The 4.0 bellhousing WON'T bolt up.

https://www.jeepforum.com/forum/f12/...using-1292403/

https://nc4x4.com/forum/threads/5-2-...pattern.11438/

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I do appreciate the information
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Old 03-24-2019, 07:32 PM   #12 (permalink)
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Thank you for killing my dreams!

I do appreciate the information
Sorry just trying to save you some time. It was a good idea. Why not get an adapter plate made like they use to do to make a Jeep T400 bolt up to a Chevy T400?

Does the bellhousing bolt to the AW4 or is it part of the housing?
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Old 03-24-2019, 07:40 PM   #13 (permalink)
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Does the bellhousing bolt to the AW4 or is it part of the housing?
One piece case.
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Old 03-24-2019, 07:45 PM   #14 (permalink)
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That is what I thought but it has been a long time since I looked at one.

Adapter plate? But most likely not worth it.
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Old 03-25-2019, 11:15 AM   #15 (permalink)
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AW-4 won't fit the Mopar Magnum small block, it does have a removable bellhousing, though. I don't think it would last behind the Magnum, anyways.

The Jeep 46RE is more compact than the Dodge 46RE, starter tucks in low and to the passenger side vs. sticking out to the drivers side. A lot better clearance for a front driver's side driveline, especially if you aren't running much lift. Also will clear a passenger side driveline, as the starter is really tucked in.

The 46RE is easy to rebuild and easy to build to hold ALOT of power. Many of the 47 and 48 RE parts and extra clutches can be installed in the 46RE. The Trans-go TFOD-2 shift kit works really well in them and cures most of the issues that the stock trans had.

The CPS bolts to the block on the Magnum engine, high and to the passenger side of center. The trans only has to be notched to clear it.
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